I really like the spell failure chance. It was a lot of fun making wild ass spells that had like a 50-75% chance of working. Getting one of those to pop off in a fight just felt so satisfying compared to the instant gratification you get for casting spells now.

I’d really like to see more spellmaking options, like the option to set the mana used for the spell, where setting less increases the failure chance, but using more makes the spell more reliable. Or maybe let the player add failure effects (like burden, paralysis, summon hostile creatures, bounce back…etc) for a reduction in spell failure chance.